im getting error after I run an UPDATE sql query and the datagridview needs to update....not sure what the problem is. heres my code, first block is what the program does on load, the second block is where im getting the problem.
Code:
Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
Module1.Main()
[Code].....
I'm using a stored procedure to fill my dataset. The stored procedure retrieves the data from a view named "vwMedicalRecords". When I bind the result to a windows DataGridView control for the first time the binding work fine but the second time it fails with the above error message.
I placed a refresh button on the form which I use to rebind the datagridview (reloading data).So the first time as I mention its working fine the second time fails third time work fine fourth time fails and so on.
[Code]...
I have an error in my application, "Child list for field GridView1 cannot be created."[code]./..
View 3 RepliesI have problem in calling DLL file in VB.Net that I had Created it in C++... it give me this error message: "An unhandled exception of type 'System.EntryPointNotFoundException' occurred in test_dll_1.exe. Additional information: Unable to find an entry point named 'add_1' in DLL 't1.dll'."
This is my code in C++ (header file)
[CODE]............
The one in the main
#include "header_1.h"
double add_1(double a, double b){
return (a+b);
[CODE].....................
This code only for creating dll and I did created it correctly and i had tested it in c++ and it did works.... but in the Vb.net I had no luck with it...This is the code that I wrote it in the VB.net
Imports System.Runtime.InteropServices
Public Class Form1
<DllImport("t1.dll")> Public Shared Function add_1(ByVal a1 As Double, ByVal a2 As Double) As Double
End Function
[CODE].....................
And, I did put the .dll file in the bin folder, but also with no luck...
Is there any literature which guides a user through the steps of deploying a vb project created with VS 2010 Professional and incorporating SQL 2008RE Database?
I have a VB project which incorporates 2 databases - 1 Access Db and 1 SQL Db. The project compiles and runs beautifully. However, after adding the databases in the project as existing items and deploying, the project opens/runs, but when I try to login the application I keep getting an error message telling me that the path to the .mdb (Access) database is not a valid path. I don't have a clue what else to do.
While I've previously many years of relational databases and procedural languages, I'm stumbling with Visual Basic. In this problem, the simple situation is that I have two files, parent and child. The primary key of the parent file (Area file) is linked by a relation to one of the two fields that makes up the primary key in the child file (Project file) (unique key is formed from 'area' and 'project'). I have the default table adapters created on both files. I have created two maintenance forms showing one each of the two files in datagrid view format.I can create some records in the Parent (Area) file, but when I try to create a record in the child (Project) file, using one of the valid key values from the Area file, I get the 'ForeignKeyConstraint [relation name] requires the child key values [actual value] to exist in the parent table' which I'm absolutely definitely sure it does.
I haven't done any actual coding for those two maintenance forms, just dragged-and-dropped the files from the data sources screen onto separate forms so it creates the controls itself. But I can't work out, if it already knows the data does exist because I can load it back in to the Area maintence form, why it can't check itself to find out the record does exist. Why does it think the record from the parent record doesn't exist? It does exactly the same thing, whether or not the database is in access or SQL Server Express. I have all the latest updates.
findwindowEX Send Message in Child of a Child of an ApplicationFirst:- my english is very ad (german)- i am a newby of Visual BasicMy Form with SQL-Integration is sending Data per Button to Notepad sucessfull. Unfortunately, the purpose application has interlocking children.But the application don become the data. to found a solution / or a Idear. i think i put in screenshots an my
Public Class Form1
'Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
how to create an error message by message box to tell the user to enter a number only if they key in a character value?
I MEAN AFTER THEY PRESS THE CALCULATE BUTTON
Private Sub btnCalcFat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalcFat.Click
Dim intFat As Integer
intFat = Integer.Parse(txtFat.Text)
lblResultDisplay.Text = txtFat.Text * 9
End Sub
My text box is call txtFat
I would like to create list of child objects from list of parent object. Like If i have list of bookingroom which has one member room then i would like to create list of room from it.
eg. code:
Dim BookingRoomList As List(Of BookingRoom) = New List(Of BookingRoom)
Dim RoomList As List(Of Room) = New List(Of Room)
BookingRoomList = BookingRooms.FillGrid()
[Code]....
Is there any short cut method instead of iterating over for earch?
I'm having a bit of a 'brain doner' moment here
I have a list of Objects. Each of these Objects contains a list of other Objects (pseudo code) :-
Private Structure Object1
dim Name as string
dim ListOfObject2 as List(Of Object2)
[Code]....
I need to sort the list of Object1 by the Value in Object2. I have a comparison class which sorts Object2 by its Value nicely.
I have a grid in which I have created and added elements from the code behind.
Dim staffImgLeft As New Controls.Image()
staffImgLeft.Name = "StaffImgLeft"
mainGrid.Children.Add(staffImgLeft)
When I am attempt to remove the child elements from the grid they are not being removed.
mainGrid.Children.Remove(mainGrid.FindName("StaffImgLeft"))
There are no errors when the code runs. Can anyone advise why my code isnt working?
way to write the LINQ query. The parent class is simply a student's name and a list of test score data. The child class is a single test score datum. I want to find the worst (or best) score out of all of the TestScore values and then identify the student who had the best score.
Dim query = From s In studentList _
Where s.ScoreList.Select(Function(d) d.TestScore).Min _
= studentList.SelectMany(Function(g) g.ScoreList).Select(Function(h)
[Code].....
I am making a small and very simple game that is ment to help children learn to recognise letters. I have come to a stop as I have 3 text fields. When something is entered into the first field, the program will set focus to the next text field. The problem is when the child tries to delete a character from a previous field as the focus is already set to the next text field. I want it to delete the character from the previous field when the backspace bar is hit. Any suggestion how this might be done?
View 5 RepliesI am having trouble catching getting the currently active text input on a 3rd party window.
If I use GetForegroundWindow it returns the handle of the main process of that window.
How can you add a click event to dynamically created menu item?I thought I could do something like
Loop through all the items in the Menu1.DropDownItems then create a mousedown even on the item and execute an action based off that.I'm new to VB and was wondering what logic to use. Will that even work? How will the events be saved through the life of the application?
I am getting the error Parser Error Message: The server tag is not well formed. on the code line below:
<asp:HyperLink ID="imgFileType" ImageUrl="images/Icon_Pdf.gif" NavigateUrl='<%#"javascript:ViewFile('erg_", Eval("DocumentName") %>' runat="server"></asp:HyperLink>
I need the url link to be parsed as:
javascript:ViewFile('erg_Invoice_3200_QRG_Restaurant.pdf');
What am I missing in the syntax?
I have writed a vb application from a code I found here ([URL]). The only problem is that : - When I send a mail with Oulook and my Postfix smtp server the mail is not classified as a spam by Gmail and the message ID field is : When I send a mail with my VB.NET application and my Postfix smtp server the mail is classified as a spam by Gmail and the message ID field is : "Message-Id: <[URL]".
View 3 RepliesFirst I have 2 tables, for example Customer and Orders, and in the database there is a foreign key relation between both. For clarity Orders have a foreign key field to the primary key of Customers, thus Customer is the parent and Orders is the child table of the relation. My application is a Windows Form application, and I add a dataset to the project, in which I drop the 2 tables, and the relations between the 2 tables is automatic added. Now I will om a form loop through the Orders table (witch is the Child table) and show in a textbox some fields of the Orders table and also the Name field of the related record of the customers table. Regarding binding a textbox fo a Orders field I do it this way,
Dim myDs As New DataSet1
Dim myAdpCustomer As New DataSet1TableAdapters.CustomerTableAdapter
Dim myAdpOrders As New DataSet1TableAdapters.OrdersTableAdapter
myAdpCustomer.Fill(myDs.Customers)
myAdpOrders.Fill(myDs.Orders)
Dim myBindingSource As New BindingSource
myBindingSource.DataSource = myDs.Orders
myBindingNavigator.BindingSource = myBindingSource
TextBox1.DataBindings.Add("Text", myBindingSource, myDs.Orders.OrderIDColumn.ColumnName)
But now I can't find how to bind a textbox to a field of the Customers table witch is the Parent table of the relation.
I am working on a 1-page report, that basically consists to select 1 record from table and bind values to proper fields (eg. =Fields!name.Value).However, I have one field in the table that will be just "Y" or "N".When this field will be "Y" I would like to show in the report "Yes, I do."; otherwise I would like to show "No, I dont."
View 1 RepliesLimited to using v2.0 of .Net framework (we use VB.net) due to environmental constraints on our servers.I've got an ASP.net webpage which pulls data from a webservice that performs checks on user accounts in active directory. Operators can check multiple accounts at one time using the web interface. The webservice returns a list(of AccountCheck) objects which themselves contain single properties like username, email address, and List(of AccountError) objects which contain multiple properties.[code]What I want to do is using some kind of repeater, create multiple panels or divs which contain labels showing the username, email etc, and a gridview which has the accounterror list bound to it to show all the errors. The users could be checking 2, 5, 7 accounts at once, and is dynamic.
View 2 RepliesI am facing another error "An error occurred trying to load the page. Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND) )" performing the following scenario:- Opened a sample VS 2010 WPF project that I receiveved from a co-worker (Project compiles, and run on his machine)I tried to open project properties (Project --> Properties)The project properties panel/window didn't open, all it had was an error symbol (red/white X) and the error message above(HRESULT: 0x80020003).I am unable to view niether the designer window nor the code window (no messages are reported) but the pane where the code/design shoud display is empty, all you can see is the background color.
View 1 RepliesI know it's possible in asp.net to create a custom error page in a web app, by putting the following line in the web.config: <customErrors mode="RemoteOnly" defaultRedirect="frmErrorPage.aspx" />
I have had to do this for my web app, since it is clearly much tidier than letting the program bomb out with it's ugly default error page. My custom error page just has the customer's logo and a brief message saying "Error has occurred. Please return to homepage"The trouble now is that I have no way of knowing what caused the error, when a customer reports it.
Is there a way to make the actual error message appear on this custom error page too?
I dragged and dropped a label control on my web form. But then whe I go to my VB .net code behind file, if I try and set a property on that label control, I am getting a "Declaration Expected" error message for the label I created.Yet if I do try and explicitly declare my label control, the compiler tells me that the label control is already declared.[code]
View 4 RepliesI currently changing an in-house Access Database to Visual Basic 2010. Since they are used to tabs in Access, I decided to use MDI Parent and MDI Child. What I dont allow is for the user to change the size of the Child. With that, I used a menu strip making one of the items [Open Windows] the MdiWindowListItem which worked great for awhile. Now I can not get any list to show no matter how many windows are opened. About the only thing I can think of that may or may not be the issue is I allow another MDI Child attached to the Parent from the MDI Child. Like below:
With newForm
.Text = formTitle
.MdiParent = Management
[Code]....
Even with removing this code to test it this caused it still had the same issue. I even went as far as adding a new menu and attaching it to the MdiWindowListItem with the same results.
Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.
View 2 RepliesI have:
Dim aList As List(Of myObj.Answers) = myObj.GetResults(someID)
This returns:
aList.AnswerID | aList.AnswerCount
1 3
2 5
3 9
How can I get the sum of aList.AnswerCount field in my List(Of myObj) ?
can someone please help me with a textbox? I have created a new class and require this textbox field within a sub in the new class but i get Error1 'TextBox1' is not declared. It may be inaccessible due to its protection level.I have tried MyClass.TextBox1 = Form1.TextBox1 but I get declaration expected.
View 23 RepliesI'm very new to programming with Visual Studio(just a few weeks). I've read through a beginner's book and I've started to write my first little programs to get used to coding and to improve my skills. One of the first programs I had created was a simple currency converter. I've created a list box and a combo box with a number of different currencies in them and I want to know if there is an easy way to attach a value to each of these selections. For example, if someone selects British Pound in the list box and Indian Rupee in the combo box, I want to be able to have the British Pound be worth 1.67(versus the dollar) and the Rupee to be 25.00(versus the dollar) for example so that I can create a simple function that will change pounds to dollars and then to Rupees so that I can do this calculation with a multitude of currencies. If you have some idea of how I can attack this problem,
View 2 RepliesAs you can see from the screen shot I have managed to get MDI Parents / Child forms working, and managed there to be a menu option on the Parent form that displays all the Child forms opened at the time. What I was wondering, and as of yet through research haven't discovered, is there a way when the list of windows is created, if a user highlights any child in the list it opens a sub-menu from its name (eg. Rename Window, Center Window, etc).
View 4 RepliesMDI Child Form List / Sub-Menu Options
View 12 Replies